.mtldiv {
    margin: 0px auto;
    width: 200px;
    animation: a 1000s;
    position: relative;
}


@keyframes a {
    form {
        transform: rotate(0deg)
    }
    to {
        transform: rotate(36000deg)
    }
}

.mtldiv img {
    width: 200px;
}

